Weather Almanac: Big Arm, MT 59910

🗓️ Historical norms for October 2025

October avg. precipitation
🌧️ 1.18"
October days below freezing
📉 ≈9.9 days
Average October lows 33°F – 38°F
USDA Zone
6a
Annual extreme lows -10°F to -5°F
Last Spring Frost (36°F)
🌷 May 31
First Fall Frost (36°F)
🍂 Sep 17
Wed. October 1  

🌅 7:36 a.m.

H: 57°F – 73°F

L: 33°F – 46°F

🌇 7:15 p.m.

Thu. October 2  

🌅 7:38 a.m.

H: 56°F – 73°F

L: 33°F – 46°F

🌇 7:13 p.m.

Fri. October 3  

🌅 7:39 a.m.

H: 56°F – 72°F

L: 33°F – 45°F

🌇 7:11 p.m.

Sat. October 4  

🌅 7:40 a.m.

H: 55°F – 72°F

L: 32°F – 45°F

🌇 7:09 p.m.

Sun. October 5  

🌅 7:42 a.m.

H: 55°F – 71°F

L: 32°F – 45°F

🌇 7:07 p.m.

Mon. October 6 🌕

🌅 7:43 a.m.

H: 54°F – 71°F

L: 32°F – 45°F

🌇 7:05 p.m.

Tue. October 7  

🌅 7:45 a.m.

H: 54°F – 70°F

L: 31°F – 44°F

🌇 7:03 p.m.

Wed. October 8  

🌅 7:46 a.m.

H: 54°F – 70°F

L: 31°F – 44°F

🌇 7:01 p.m.

Thu. October 9  

🌅 7:47 a.m.

H: 53°F – 69°F

L: 31°F – 44°F

🌇 6:59 p.m.

Fri. October 10  

🌅 7:49 a.m.

H: 53°F – 68°F

L: 30°F – 44°F

🌇 6:57 p.m.

Sat. October 11  

🌅 7:50 a.m.

H: 52°F – 68°F

L: 30°F – 43°F

🌇 6:55 p.m.

Sun. October 12  

🌅 7:52 a.m.

H: 52°F – 67°F

L: 30°F – 43°F

🌇 6:53 p.m.

Mon. October 13 Columbus Day 🌗

🌅 7:53 a.m.

H: 51°F – 67°F

L: 29°F – 43°F

🌇 6:51 p.m.

Tue. October 14  

🌅 7:55 a.m.

H: 51°F – 66°F

L: 29°F – 43°F

🌇 6:49 p.m.

Wed. October 15  

🌅 7:56 a.m.

H: 50°F – 66°F

L: 29°F – 42°F

🌇 6:47 p.m.

Thu. October 16  

🌅 7:58 a.m.

H: 50°F – 65°F

L: 28°F – 42°F

🌇 6:45 p.m.

Fri. October 17  

🌅 7:59 a.m.

H: 49°F – 64°F

L: 28°F – 42°F

🌇 6:44 p.m.

Sat. October 18  

🌅 8:01 a.m.

H: 49°F – 64°F

L: 28°F – 42°F

🌇 6:42 p.m.

Sun. October 19  

🌅 8:02 a.m.

H: 48°F – 63°F

L: 27°F – 42°F

🌇 6:40 p.m.

Mon. October 20  

🌅 8:04 a.m.

H: 47°F – 63°F

L: 27°F – 41°F

🌇 6:38 p.m.

Tue. October 21 🌑

🌅 8:05 a.m.

H: 47°F – 62°F

L: 27°F – 41°F

🌇 6:36 p.m.

Wed. October 22  

🌅 8:07 a.m.

H: 46°F – 62°F

L: 27°F – 41°F

🌇 6:34 p.m.

Thu. October 23  

🌅 8:08 a.m.

H: 46°F – 61°F

L: 26°F – 41°F

🌇 6:33 p.m.

Fri. October 24  

🌅 8:10 a.m.

H: 45°F – 61°F

L: 26°F – 41°F

🌇 6:31 p.m.

Sat. October 25  

🌅 8:11 a.m.

H: 45°F – 60°F

L: 26°F – 41°F

🌇 6:29 p.m.

Sun. October 26  

🌅 8:13 a.m.

H: 44°F – 60°F

L: 25°F – 40°F

🌇 6:27 p.m.

Mon. October 27  

🌅 8:14 a.m.

H: 44°F – 59°F

L: 25°F – 40°F

🌇 6:26 p.m.

Tue. October 28  

🌅 8:16 a.m.

H: 43°F – 59°F

L: 25°F – 40°F

🌇 6:24 p.m.

Wed. October 29 🌓

🌅 8:17 a.m.

H: 43°F – 58°F

L: 25°F – 40°F

🌇 6:22 p.m.

Thu. October 30  

🌅 8:19 a.m.

H: 42°F – 58°F

L: 24°F – 40°F

🌇 6:21 p.m.

Fri. October 31 Halloween  

🌅 8:20 a.m.

H: 41°F – 57°F

L: 24°F – 39°F

🌇 6:19 p.m.


Temperature climatic data from weather station: POLSON KERR DAM (USC00246640)

Precipitation climatic data from weather station: POLSON KERR DAM (USC00246640)

Agricultural climatic data from weather station: POLSON KERR DAM (USC00246640)